In order to work in the U.S. as an international student, you must obtain a Social Security Number

US Department of Homeland Security

Why do I need a Social Security Number? In order to work in the United States, every eligible F and M student needs a Social Security Number (SSN). If you do not know if you are eligible to work, please speak with your designated school official (DSO) or responsible officer (RO).

Am I able to apply for an SSN? F and M students who have authorization to work in the United States may apply for an SSN. In addition, any F or M student who wishes to apply for a driver's license (in a state requiring an SSN before getting a license) may apply for an SSN.

Many states require that you or your dependent have an SSN or have already applied for one before you apply for a driver's license. If you or your dependents are not eligible to work, but want to apply for a driver's license, you must first apply for an SSN at the local Social Security office and receive a Form SSA-L676, "Refusal to Process SSN Application."